Abstract
Improvements in ultrasound (US) resolution have led to the application of this non-ionizing imaging modality in the diagnosis of soft tissue disorders affecting the head and neck region. Although operator experience is paramount in image interpretation, US has the advantage of being inexpensive, safe and widely available. Ultrasound is the first line imaging modality for suspected salivary gland tumours and is useful in evaluating superficial neck swellings, such as lymph node disease, soft tissue cysts and vascular malformations. Ultrasound also improves the success rate when used for guidance during fine-needle aspiration cytology (FNAC). This paper aims to provide the general practitioner with an overview of the basic principles of image formation, the advantages and disadvantages of US, and an outline of its indications for conditions that might present to the dental practitioner.
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